Struggling with buying the right ball bearings for your agricultural equipment and other rotating components? You’ve come the right place. In this guide, we’ll talk about the ball bearing sizes chart, how to measure the sizes and choose the correct ball bearings at FridayParts.
What Is A Ball Bearing?
Deep groove ball bearings are the key element in many industrial and machinery applications. Its ability to reduce friction between moving surfaces and support radial and axial loads in both directions makes it a default choice across electric motors, water pumps, gearboxes, agricultural equipment and other rotating components.
What Is A Bearing Size Chart?
A bearing size chart is a standardized reference table that matches bearing part numbers to their three core physical dimensions: bore diameter(d), outer diameter(D) and width(B or T). The table also includes the load ratings and speed limits. These measurements are normally taken in millimeters, but can be converted to inches. In fact, most manufacturers and suppliers offer bearing measurements in both imperial and metric systems.
The ball bearing size charts are issued by reputed manufacturers, including SKF, NSK, NTN and aligned to ISO dimensional standards. Two bearings carrying the same ISO part number from different brands will have identical outer dimensions. They will physically fit the same shaft and housing.
Ball Bearing Size Chart
Ball bearings are available in all different sizes, depending on the shaft size and requirements of the application. Let’s see the size chart of the most widely used ball bearing series one by one.
6200 Series
| Size | Inner (d)/mm | Outer (D)/mm | Width(B)/mm | Size | Inner (d)/mm | Outer (D)/mm | Width (B)/mm |
|---|---|---|---|---|---|---|---|
| 6200 | 10 | 30 | 9 | 6214 | 70 | 125 | 24 |
| 6201 | 12 | 32 | 10 | 6215 | 75 | 130 | 25 |
| 6202 | 15 | 35 | 11 | 6216 | 80 | 140 | 26 |
| 6203 | 17 | 40 | 12 | 6217 | 85 | 150 | 28 |
| 6204 | 20 | 47 | 14 | 6218 | 90 | 160 | 30 |
| 6205 | 47 | 52 | 15 | 6219 | 95 | 170 | 32 |
| 6206 | 30 | 62 | 16 | 6220 | 100 | 180 | 34 |
| 6207 | 35 | 72 | 17 | 6221 | 105 | 190 | 36 |
| 6208 | 40 | 80 | 15 | 6222 | 110 | 200 | 38 |
| 6209 | 45 | 85 | 19 | 6224 | 120 | 215 | 40 |
| 6210 | 50 | 90 | 20 | 6226 | 130 | 230 | 40 |
| 6211 | 55 | 100 | 21 | 6228 | 140 | 250 | 42 |
| 6212 | 60 | 110 | 22 | 6230 | 150 | 270 | 45 |
| 6213 | 65 | 120 | 23 |
6300 Series
| Size | Inner (d)/mm | Outer (D)/mm | Width(B)/mm | Size | Inner (d)/mm | Outer (D)/mm | Width(B)/mm |
|---|---|---|---|---|---|---|---|
| 6300 | 10 | 35 | 11 | 6313 | 65 | 140 | 33 |
| 6301 | 12 | 37 | 12 | 6314 | 70 | 150 | 35 |
| 6302 | 15 | 42 | 13 | 6315 | 75 | 160 | 37 |
| 6303 | 17 | 47 | 14 | 6316 | 80 | 170 | 39 |
| 6304 | 20 | 50 | 15 | 6317 | 85 | 180 | 41 |
| 6305 | 25 | 62 | 17 | 6318 | 90 | 190 | 43 |
| 6306 | 30 | 72 | 19 | 6319 | 95 | 200 | 45 |
| 6307 | 35 | 80 | 21 | 6320 | 100 | 215 | 47 |
| 6308 | 40 | 90 | 23 | 6321 | 105 | 225 | 49 |
| 6309 | 45 | 100 | 25 | 6322 | 110 | 240 | 50 |
| 6310 | 50 | 110 | 27 | 6324 | 120 | 260 | 55 |
| 6311 | 55 | 120 | 29 | 6326 | 130 | 280 | 58 |
| 6312 | 60 | 130 | 31 | 6328 | 140 | 300 | 62 |
6000 Series
| Size | Inner (d)/mm | Outer (D)/mm | Width(B)/mm | Size | Inner (d)/mm | Outer (D)/mm | Width(B)/mm |
|---|---|---|---|---|---|---|---|
| 6000 | 10 | 26 | 8 | 6013 | 65 | 100 | 18 |
| 6001 | 12 | 28 | 8 | 6014 | 70 | 110 | 20 |
| 6002 | 15 | 32 | 9 | 6015 | 75 | 115 | 20 |
| 6003 | 17 | 35 | 10 | 6016 | 80 | 125 | 22 |
| 6004 | 20 | 42 | 12 | 6017 | 85 | 130 | 22 |
| 6005 | 25 | 47 | 12 | 6018 | 90 | 140 | 24 |
| 6006 | 30 | 55 | 13 | 6019 | 95 | 145 | 24 |
| 6007 | 35 | 62 | 14 | 6020 | 100 | 150 | 24 |
| 6008 | 40 | 68 | 15 | 6021 | 105 | 160 | 26 |
| 6009 | 45 | 75 | 16 | 2022 | 110 | 170 | 28 |
| 6010 | 50 | 90 | 16 | 6024 | 120 | 180 | 28 |
| 6011 | 55 | 90 | 18 | 6026 | 130 | 200 | 33 |
| 6012 | 60 | 95 | 18 | 6028 | 140 | 210 | 33 |
* Data sourced from SKF Rolling Bearings Catalogue.
How to Measure the Ball Bearings Myself?
It may not sound strange that the bearing numbers may be illegible or completely worn due to long-term use. You can measure the size manually with a vernier caliper. A ruler is also practical.
The steps are as follows:
- Measure the inner diameter first: Insert the outside anvils of the caliper into the inner ring of the bearing. Make sure it fits just from edge to edge and is not tight or applying pressure on the bearing. Or, measure the inner circle of the bearing from end to end with a ruler.
- Measure the outer diameter: Place the bearing in the jaws of the caliper until it fits perfectly. Or measure the bearing from one outside edge to the other with a ruler.
- Repeat the last step for the width of the bearing.
- Use a bearing size chart to find the bearing series number.
Tips for Selecting the Right Bearings with Ball Bearing Size Chart
- Start with shaft diameter. Bore (d) is always first. Everything else follows.
- Measure the housing directly. Housing bores wear over time. Measure the housing itself, not the old bearing’s OD.
- Check the speed limit before finalizing. Sealed bearings have a lower speed limit than open equivalents. Confirm your RPM is below the rated maximum for the specific variant you are ordering.
- Verify all three dimensions when cross-referencing brands. Part number alone is not enough. d, D, and B must all match.
How Can You Source the Right Ball Bearings at FridayParts?
FridayParts provides an extensive selection of ball bearings for your agricultural machinery and other rotating components. All bearings in our selection are built to rigorous standards to ensure great compatibility and reliable performance. You can simply enter the part names and your model numbers or part numbers to find your ball bearings. If you have difficulty finding the exact one, please feel free to contact us. Our friendly parts specialists are standing by to assist with any of your parts needs.
Wrapping up
Finding the right ball bearings for your agricultural machinery is straightforward if you start with the bore, outer diameter and width. Match those to your shaft and housing, verify the load ratings cover your application, confirm you are within the speed limit and the bearing will fit and run. A wiser option is to choose reliable aftermarket suppliers such as FridayParts. You needn’t measure those three numbers and match them with the ball bearing size chart, as we can match them to your specific needs with the part numbers and model numbers.
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